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Adjustable Motor Bases - NEMA 48-447T Frames
Heavy gauge steel mounting bases simplify the install-
ation of motors and make the tensioning, maintenance
and replacement of belts a simple efficient task. Fabri-
cated from sheet or steel plate, then primed and finished
in a gray rust and corrosion resistant oven-baked finish.
Gussets and reinforcing channels on larger units and
continuous seam welding on all units give these bases
strength and durability for a long
life. A single (215T frame and
smaller) or double (NEMA 254T
frame and larger) zinc plated ad-
justing screw is provided. Motor
mounting bolts are included. Adjustable motor bases
are designed to mount to your existing motor’s base.
* Motor mounting bolt diameter and length, four supplied with each base.
** Base mounting bolts, four required—not supplied with base.
Specifications are subject to change without notice
NOTE: These bases are not suitable for vertical mounting. All dimensions in
inches.
Transition Bases
Transition bases compensate for the difference in
mounting dimensions and shaft height of a rigid base
NEMA T frame to the next higher NEMA U frame. This
makes it possible, for example, to replace a 10 HP NEMA
254U frame motor with a 10 HP NEMA 215T frame
motor without modifying the basic installation. Made of
the same high-quality materials and construction as the
adjustable motor bases above. They are for horizontal
mountings, shimming may be needed for direct cou-
pled loads. Thread size listed is for mounting transition
base to the “T” frame motor. Dimensions listed are for
one piece—two are supplied, one for each side of the
motor’s foot.
Specifications are subject to change without notice
Converts T
Frame
To U
Frame Catalog Number
List
Price
App. Wgt.
(lbs.)
Height
(Inches)
Width
(Inches)
Length
(Inches)
Thread
143T/145T 182/184 175091.00
84
2
1
2
1
⁄
4
7
1
⁄
2
5
⁄
16
-18
182T/184T 213/215 175092.00
122
3
3
⁄
4
1
3
⁄
4
9
1
⁄
2
3
⁄
8
-16
213T/215T 254U/256U 175093.00
144
5
1
2
7
⁄
16
12
3
⁄
4
3
⁄
8
-16
254T/256T 284U/286U 175094.00
202
8
3
⁄
4
2
3
⁄
4
14
1
⁄
4
1
⁄
2
-13
284T/286T 324U/326U 175095.00
269
10
1
3
1
⁄
4
15
3
⁄
4
1
⁄
2
-13
324T/326T 364U/365U 175097.00
341
13
1
3
11
⁄
16
16
1
⁄
2
5
⁄
8
-11
364T/365T 404U/405U 175098.00
456
22
1
4
1
⁄
4
18
5
⁄
8
5
⁄
8
-11
404T/405T 444U/445U 175127.00
583
24
1
4
1
⁄
4
21
5
⁄
8
3
⁄
4
-10
NEMA 48 thru 215T
NEMA 254T thru 447T
BT
D BOLT
E
E
AO
AO
AL
AM
AR
AR
AYBOLT
AU DIA.
BB
F
XC
AX
AT
BT
E
E
AO
AO
AL
AM
AR
AR
AYBOLT
AU DIA.
BB
F
XC
AX
AT
F
D BOLT
Frame
List
Price
Catalog
Number AL AM AX BB E F AO AR AU** BT AT XC
D*
Bolt
AY
Bolt
App.
Wgt.
(lbs.)
48 83 175032.00 10 6
1
⁄
4
1
1
⁄
8
4
1
⁄
4
2
1
⁄
8
1
3
⁄
8
3
1
⁄
2
2
3
⁄
4
3
⁄
8
3.00 0.08
7
⁄
8
5
⁄
16
x 1
3
⁄
8
x 4 2
56 83 175033.00 10
5
⁄
8
6
1
⁄
2
1
1
⁄
8
4
1
⁄
2
2
7
⁄
16
1
1
⁄
2
31
3
⁄
16
2
7
⁄
8
3
⁄
8
3.00 0.08
7
⁄
8
5
⁄
16
x 1
3
⁄
8
x 4 3
143T 99 175034.00 10
1
⁄
2
7
1
⁄
2
1
1
⁄
8
5
1
⁄
2
2
3
⁄
4
2 3
3
⁄
4
3
3
⁄
8
3
⁄
8
3.00 0.12 1
3
⁄
16
5
⁄
15
x 1
3
⁄
8
x 4 5
145T 99 175035.00 10
1
⁄
2
8
1
⁄
2
1
1
⁄
8
6
1
⁄
2
2
3
⁄
4
2
1
⁄
2
3
3
⁄
4
3
7
⁄
8
3
⁄
8
3.00 0.12 1
3
⁄
16
5
⁄
15
x 1
3
⁄
8
x 4 6
182T 128 175036.00 12
3
⁄
4
9
1
⁄
2
1
1
⁄
2
6
1
⁄
2
3
3
⁄
4
2
1
⁄
4
4
1
⁄
2
4
1
⁄
4
1
⁄
2
3.00 0.13 1
1
⁄
2
3
⁄
8
x 1
3
⁄
4
1
⁄
2
x 5 9
184T 128 175037.00 12
3
⁄
4
10
1
⁄
2
1
1
⁄
2
7
1
⁄
2
3
3
⁄
4
2
3
⁄
4
4
1
⁄
2
4
3
⁄
4
1
⁄
2
3.00 0.13 1
1
⁄
2
3
⁄
8
x 1
3
⁄
4
1
⁄
2
x 5 9
213T 158 175038.00 15 11 1
3
⁄
4
7
1
⁄
2
4
1
⁄
4
2
3
⁄
4
5
1
⁄
4
4
3
⁄
4
1
⁄
2
3
1
⁄
2
0.16 1
1
⁄
2
3
⁄
8
x 1
3
⁄
4
1
⁄
2
x 5 13
215T 158 175039.00 15 12
1
⁄
2
1
3
⁄
4
9 4
1
⁄
4
3
1
⁄
2
5
1
⁄
4
5
1
⁄
2
1
⁄
2
3
1
⁄
2
0.16 1
1
⁄
2
3
⁄
8
x 1
3
⁄
4
1
⁄
2
x 5 15
254T 241 175040.00 17
3
⁄
4
15
1
⁄
8
2 10
3
⁄
4
5 4
1
⁄
8
6
1
⁄
4
6
5
⁄
8
5
⁄
8
4.00
3
⁄
16
1
7
⁄
16
1
⁄
2
x 1
3
⁄
4
5
⁄
8
x 6 17
256T 241 175041.00 17
3
⁄
4
16
7
⁄
8
2 12
1
⁄
2
5 5 6
1
⁄
4
7
1
⁄
2
5
⁄
8
4.00
3
⁄
16
1
7
⁄
16
1
⁄
2
x 1
3
⁄
4
5
⁄
8
x 6 18
284T 262 175042.00 19
3
⁄
4
16
7
⁄
8
2 12
1
⁄
2
5
1
⁄
2
4
3
⁄
4
7 7
1
⁄
2
5
⁄
8
4
1
⁄
2
3
⁄
16
1
11
⁄
16
1
⁄
2
x 2
5
⁄
8
x 6 21
286T 262 175043.00 19
3
⁄
4
18
3
⁄
8
2 14 5
1
⁄
2
5
1
⁄
2
7 8
1
⁄
4
5
⁄
8
4
1
⁄
2
3
⁄
16
1
11
⁄
16
1
⁄
2
x 2
5
⁄
8
x 6 22
324T 346 175044.00 22
3
⁄
4
19
1
⁄
4
2
1
⁄
2
14 6
1
⁄
4
5
1
⁄
4
8 8
1
⁄
2
3
⁄
4
5
1
⁄
4
3
⁄
16
2
3
⁄
16
5
⁄
8
x 2
1
⁄
2
3
⁄
4
x 9 31
326T 346 175045.00 22
3
⁄
4
20
3
⁄
4
2
1
⁄
2
15
1
⁄
2
6
1
⁄
4
6
8 9
1
⁄
4
3
⁄
4
5
1
⁄
4
3
⁄
16
2
3
⁄
16
5
⁄
8
x 2
1
⁄
2
3
⁄
4
x 9 32
364T 456 175046.00 25
1
⁄
2
20
1
⁄
2
2
1
⁄
2
15
1
⁄
2
7 5
5
⁄
8
9 9
1
⁄
8
3
⁄
4
6.00
1
⁄
4
2
1
⁄
16
5
⁄
8
x 2
1
⁄
2
3
⁄
4
x 9 44
365T 456 175047.00 25
1
⁄
2
21
1
⁄
2
2
1
⁄
2
16
1
⁄
2
7 6
1
⁄
8
9 9
5
⁄
8
3
⁄
4
6.00
1
⁄
4
2
1
⁄
16
5
⁄
8
x 2
1
⁄
2
3
⁄
4
x 9 45
404T 820 175048.00 28
3
⁄
4
22
3
⁄
8
3 16
1
⁄
2
8 6
1
⁄
8
10 9
7
⁄
8
7
⁄
8
7.00
1
⁄
4
2
1
⁄
2
3
⁄
4
x 3
3
⁄
4
x 11 60
405T 820 175049.00 28
3
⁄
4
23
7
⁄
8
3 18 8 6
7
⁄
8
10 10
5
⁄
8
7
⁄
8
7.00
1
⁄
4
2
1
⁄
2
3
⁄
4
x 3
3
⁄
4
x 11 61
444T 1015 175088.00 31
1
⁄
4
24
5
⁄
8
3 19
1
⁄
4
9 7
1
⁄
4
11 11.0
7
⁄
8
7
1
⁄
2
1
⁄
4
2
1
⁄
2
3
⁄
4
x 3
3
⁄
4
x 11 68
445T 1015 175089.00 31
1
⁄
4
26
5
⁄
8
3 21
1
⁄
4
9 8
1
⁄
4
11 12.0
7
⁄
8
7
1
⁄
2
1
⁄
4
2
1
⁄
2
3
⁄
4
x 3
3
⁄
4
x 11 73
447T 1119 175090.00 31
1
⁄
4
30
1
⁄
8
3 24
3
⁄
4
9 10 11 13
3
⁄
4
7
⁄
8
7
1
⁄
2
5
⁄
16
3
3
⁄
4
x 3
1
⁄
2
3
⁄
4
x 11 92
449T 1119 175302.00 31
1
⁄
4
35
1
⁄
8
3 29
3
⁄
4
9 12
1
⁄
2
11 16
1
⁄
4
7
⁄
8
7
1
⁄
2
5
⁄
16
3
3
⁄
4
x 3
1
⁄
2
3
⁄
4
x 11 95